Abstract: In network control systems, there is a great amount of short frame real-time data. Traditional end-to-end switching technology is associated with significant queuing delays. When network load is increased, it also has low transmission efficiency and high bandwidth utilization. We propose a real-time synchronous switching technology for network control systems, based on a 4-layer switch network. In the aperiodic data transfer phase, the proposed technology optimizes the communication task numbers of each switch port and schedules task execution times. In the periodic data transfer phase, packets can be received and forwarded synchronously, according to the four steps-receiving, splitting, reorganizing, and forwarding. This method can reduce queuing delays and improve the synchronization of data transmission, as well as providinghigher transmission efficiency and lower bandwidth utilization. Our simulation results demonstrate the feasibility and the advantages of this method.